/******************************************************************************

    Copyright (C) 2006 Alessio Stalla (alessiostalla@gmail.com)

    This file is part of PrettyProlog.

    PrettyProlog is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    PrettyProlog is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with PrettyProlog; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    See the file COPYING for further details.

 *****************************************************************************/

package prettyprolog.engine;

import prettyprolog.datatypes.Term;

/** Exception thrown when a Term which should be a Clause isn't. */
public class NotAClauseException extends RuntimeException {

	private static final long serialVersionUID = 1L;
	private Term term;

	public NotAClauseException() {
		super("Invalid clause.");
		term = null;
	}

	public NotAClauseException(Term t) {
		super(t + " is not a valid clause");
		term = t;
	}

	public Term getTerm() {
		return term;
	}
}